React setState更新数组中的某个元素Element item

1. var items = this.state.items;
2. items[i].status = 'doing';
3. this.setState({
4. items: items
5. });

//this.state.useLists[index].status === '10'?

　　let items = this.state.useLists;

　　items[index] === '10' ? items[index] = '20' : items[index] = '10';

　　this.setState({

　　useLists:items

});